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arXiv 2102.08681math.AP
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加权$\mathbf{R}^n$上有界$\mathcal{A}$ -(超)调和函数和拟(超)调和函数可去奇点

Removable singularities for bounded $\mathcal{A}$-(super)harmonic and quasi(super)harmonic functions on weighted $\mathbf{R}^n$

Anders Björn

摘要:

众所周知,对于有界$p$ -调和函数,$p$ -容量零点的集合是可去的,但是在度量空间上有正容量的可去集合的例子。在本文中,我们表明,这可能会发生在未加权的$\mathbf{R}^n$时,$n > p$,虽然只有在非常特殊的情况下。给出了加权$\mathbf{R}^n$上有界$\mathcal{A}$ -调和函数$n \ge 1$的可去奇点的一个完整刻画,其中权是$p$ -容许的。同样的特征也表明,持有加权$\mathbf{R}^n$,$n \ge 2$,以及对非加权$\mathbf{R}$的有界拟调和函数。对于加权$\mathbf{R}^n$,$n \ge 2$上的有界$\mathcal{A}$ -超调和函数和有界拟超调和函数,证明了相对闭集是可去的当且仅当它们的容量为零.

英文摘要:

It is well known that sets of $p$-capacity zero are removable for bounded $p$-harmonic functions, but on metric spaces there are examples of removable sets of positive capacity. In this paper, we show that this can happen even on unweighted $\mathbf{R}^n$ when $n > p$, although only in very special cases. A complete characterization of removable singularities for bounded $\mathcal{A}$-harmonic functions on weighted $\mathbf{R}^n$, $n \ge 1$, is also given, where the weight is $p$-admissible. The same characterization is also shown to hold for bounded quasiharmonic functions on weighted $\mathbf{R}^n$, $n \ge 2$, as well as on unweighted $\mathbf{R}$. For bounded $\mathcal{A}$-superharmonic functions and bounded quasisuperharmonic functions on weighted $\mathbf{R}^n$, $n \ge 2$, we show that relatively closed sets are removable if and only if they have zero capacity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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